Heat conduction arrester in automatic beverage dispensers



Jan. 27, 1953 2,626,785

HEAT CONDUCTION ARRESTOR IN AUTOMATIC BEVERAGE DISPENSERS pm- LEWISZETAL 7 Sheets-Sheet 1 Filed Jan. 2, 1951 R /m n N 5 M mm m 1.55 M L Y M E5 ILL F Jan; 27, 1953 L. M. LEWIS in AL HEAT CONDUCTION ARRESTOR IN AUTOMATI-C EEVERAG E DISPENSERS Filed Jan. 2, 1951 7 Sheets-Sheet 2 FIG. 3.

FIG. 2.

FIG. 4.

INVENTORS. LEROY M. LEW/S 8 LEROY FIG. 6.

H 6 W F. L M.

ATTORNE 5.

Jan. 27, 1953 L. M. LEWIS EI'AL 2,626,785 HEAT CONDUCTION ARRESTOR IN AUTOMATIC BEVERAGE DISPENSERS 7 Sheets-She't 5 Filed Jan. 2, 1951 R maJ m T 3 E N55 N MM m EE T LL A WW HR u Jan. 27, 1953 1.. M. LEWIS ErAI-E 2,326,785

HEAT; counucTi'oN 'A RREsToR IN AUTOMATIC BEVERAGE DISPENSERS Filed Jan. 2, 1951 7 Sheets-Sheet 4 ATTORNEYS,

Jan. 27, 1953 1.. M. LEWIS ETAL.

HEAT CONDUCTION ARRESTOR IN AUTOMATIC BEVERAGE DISPENSERS Filed Jan. 2, 1951 7 Sheets-Sheet 5 96 142 as g 100 102 139 7 1 1 104 11 I '98 106 104 110 TILL- ?21111-1: 10s I 1 1 114 10a 12o 1o8 l 122 124 FIG. /2. 1 film INVENTORS. LEROY M. LEW/S &

LEROY- M. LEW/S) JR ATTORNEYS.

Jan. 27, 1953 L. M.'LEWIS E A; 2,626,785

HEAT 'CONDUCTION 'ARRESTOR IN AUTOMATICH-BEVERAGE DISPENSERS" 7 Sheet s-Sheet ..6

Filed Jan. 2, 1951 INVENTORS. LEROY M. LEW/S a: LEROY M. LEW/S) JR.

BY ATTORNEYS.

Jan. 27, 1953 L. M. LEWIS EVAL- HEAT CONDUCTION ARRES TOR IN AUTOMATIC BEVERAGE DISPENSERS 7 Sheets-Sheet 7 Filed Jan. 2 1951 2 3 onn\ A m an 2m INVENTORS. LEROY M. LEW/S & LEROY M. LEW/S 2: 1 Sn Q3 Q3 N oun 2n, l I? A $0 k on Q3 w 3 Q 5 3n m3 an 3n '3 A| 03 N8 N2 2 3n 1-- -J g m3 ufi MF WU; 3 wwu Patented Jan. 27, 1953 HEAT CONDUCTION ARRESTERIN AUTO- MATIC BEVERAGE DISPENSERS Leroy M. Lewis and Leroy M. Lewis, J r., Rosemont, Pa., assignors to American National Dispensing 00., Lansdale, Pa., a corporation of Pennsylvania Application January 2, 1951, Serial No. 203.872

.4 Claims.

This invention relates to a vending machine and more particularly to a coin operated vending machine adapted to dispense beverages comprising a mixture of one or more solids with a liquid.

A machine in accordance with this invention is particularly adaptable for the dispensing of hot food beverages, such as, for example, coffee, cocoa, soups and the like. It is well known that the majority of food products which are prepared with a View to mixing them with hot water for serving as a beverage can best be preserved in the dry state. An excellent example of this is coffee of the instant type. Such cofiee in powdered or granular form retains its flavor for a very much longer period of time than an instant coffee prepared and stored in the form of a concentrated liquid. It is also true that other food products, such as cocoa and soup concentrates, will retain their flavor in-the dry form far longer than in a concentrated liquid form if unrefrigerated.

There are numerous problems involved in developing an economical and satisfactory machine which will store one or more foodproducts in a dry state and dispense them in admixture with a hot liquid. One of theprincipal problems is to prevent the vapor emanating from the hot liquid from reaching the stored food products and thus causing them to become gummyand clog the dispensing mechanism.

Another principal problem is to provide adequate means for thoroughly mixing the food product with the liquid. Such means must insure that all of the 1 food product dispensed from the food storage means will be vthoroughly.mixedwith the. liquid, leavingno residue.

Astill further problem of major importance is to provide combined storage and dispensing :means which will insure that an accurate amount of food product will be dispensed from the storage means when. needed.

As an aid .in solving these. and other problems, it is known to utilize aheating jacket to keep the mixing bowl an'dthe passage leading from the mixing bowl to the stored food product warm. This, unfortunately, has resulted in the transfer of an undesirable amount of heat .to the storage chamber and the consequent deterioration of the food product.

It is, therefore, an object of this invention to provide a vending machine which will' dispense one or-more food products in admixture with a hot liquid and which will prevent excessive amounts of heatsfroin reaching the stored ,food product.

These and other objectsof this invention will become .apparenton reading the .following description in conjunction with thedrawin'gs, in which:

Figure 1 is a front elevation of.a vendingmachine in accordance with this invention with a part of the casing broken away;

cated by theline 88 in Figure 7;

Figure 9 is a rear elevation of one of the cams of Figure .8showing the cam .clutching'means in the disengaged position;

Figure 10.is.a rearview of the cam of'Fi'gure 9 showing the cam clutching meansin'the engaged position;

Figure 11 is a side elevation of the cam of Figure 9;

Figure .12 isa sectional view showing two of the storage hoppers and the mixing bowl taken .on the planetindioated by .the .line l2-I2 in Figure '7 and .also showing a portion of the dispensing spout. broken away;

Figure 13 is a front elevation of the control cams of Figure 1 with the front of the control cam casing removed;

Figure 14 is a side elevation of the control cams of 'Figure'l3;

Figure 15 is a schematic'showing of'the operating' range of the cams of Figure 13; "and Figure 16'is a wiring diagram of the vending machine power'and control circuits.

A vending machine 2 in accordance with this invention is shown in Figure 1. As shown, the vending machine has a casing 4 which acts to support and enclose the various component parts of the vending machine. 'The casing d isshown resting on a floor 6.

Supported "within the .casing principally by frame I arethreeidentical storage hoppers A, 'A' .andA". .As isillustrated more :clearly in comprisesaoasing 8 whichhas .apairof walls I separated by 120 and curved front wall I2 which has an inwardly sloping lower portion I4. The hoppers are preferably air tight except for an outlet opening.

Casing 8 has a discharge neck I6 in which is inserted a valve seat member I8. A valve 20 is adapted to engage the valve seat member l8 and is threadably secured to a stem 22. Stem 22 carries a serrated agitator 24, a quadrant agitator 26 and straight agitators 28 in that order from the lower portion of the stem to the upper portion of the stem. Stem '22 passes upwardly through bushing 30 and casing 32'.

A coil compression spring 34 within casing 32 and resting on the bottom thereof encompasses stem 22 and has its upper end abutting against a flanged nut 36. A nut 38 carries a plate 40 which is adapted to coact with a tappet 42 which is, in turn, secured to a rocker arm.

The valves 20 of the storage hoppers A, A and A" are operated by mechanism which is best shown in Figures 7-11. The tappets 42 associated with the valves 20 in the hoppers A, A and A", respectively, are secured to rocker arms 44, 46 and 48, respectively. These rocker arms are journalled on a shaft 50 which, in turn, is carried at either end by supports 52. 52. Supports 52- are secured to plate I which has a rubber gasket sheet 53 adapted to seal closed the tops of the hoppers A, A and A. Spacers 54 encompass shaft 50 and keep the three rocker arms properly positioned on shaft 50.

Each of the rocker arms 44, 46 and 48 have adjustably secured on their rear ends a tappet 56. Tappets 56 have on their lower surface a projection member 58. A shaft 60 is carried in bearings 62, 62 below tappets 56 and is connected to a motor 64 carried by support 65 (see Fig. 1). In association with each tappet 56 and shaft 60 are identical clutches 06, 66' and 66".

Each clutch comprises a serrated faced member 68 which is keyed to shaft 60 and a member having a serrated face adapted to engage the face member 68. Each member I0 has secured thereto a cam I2 which has an opening 14 at the cams low point and adapted to permit the entry of tappet projection 58 and a flange I6 which is adapted to abut against one side of projection 58. Compression coil spring I8 is carried inside members 68 and I0 so as to bias member 10 away from member 68 and cause opening 14 to embrace projection 58, thus insuring that valve will be in the closed position after the declutching occurs. Declutching cannot occur except when valve 20 is in the closed position, since cam I2 will abut against projection member 58 until this member enters opening 14.

Member I0 of clutch 06 is forced against spring 18 into the clutched position by a solenoid 80 through fork 82. The member I0 of clutch 66' is operated by solenoid 84 through fork 86 and member I0 of clutch 66" is operated by solenoid 88 through fork 90.

Shaft 60 is connected to an electric motor 64. It will be apparent that when motor 64 is operated, the cams which are clutched to shaft 60 will rock the related rocker arms, thus opening and closing the desired valve 20'. It is preferable that the shaft 60 be operated at about 400 R. P. M. varying widely depending, of course, on factors such as the food product to be dispensed. Such a speed provides extremely accurate metering of the food products out of the hoppers and permit the agitators to work with maximum efiiciency.

The hoppers A, A and A are each supported by a sleeve 94 into which the discharge neck I6 fits. Sleeve 94 is threaded to a Venturi tube 95 which fits into bowl inlet opening 98. Each tube 96 has a flange I00 which engages the bowl cover I02.

Bowl cover I02 is secured to bowl I03 by bolts I04. The cover I02 has a circular flange I05, the upper portion of which fits tightly inside bowl I 03. The lower portion of flange I06 is spaced slightly away from the inner surface of bowl I0 3 providing a passage I08. Bowl I03 has a semicircular cut-out portion IIO forming an annular conduit above passage I06. A hot water supply line II4 runs into cut-out portion I I0 tangentially at I I0. It will be apparent from the construction of top I02 and bowl I03 discussed thus far that hot water supplied by pipe I I4 will be delivered to the bowl without splashing and in a manner such that there will be a flow of water throughout the full extent of the bottom of the bowl.

The bowl bottom II8 slopes downwardly toward discharge opening I20, the bottom II8 forming together with flange I06 a portion of passage I68. Discharge orifice I20 is shaped like a truncated cone having its greatest diameter at its lower end I22. It will be noted that the bowl bottom H8 and discharge orifice I20 form a Venturi which promotes the discharge of the beverage to be vended. It will further be noted that the tubes 96 are offset from discharge oriflce I20 in order that the ingredients being discharged from the hopper will fall into the bowl rather than directly through orifice I20.

The flow of liquid from the bowl I03 after passing through discharge orflce I20 is carried by a tube turn I24, a tube I26 and a tube I28. In order to prevent splasing in a receiving vessel, a bafiied nozzle I30 is placed in the end of tube I28. Nozzle I30 has a smaller radius than the other flow conducting tubes and has opposed bafiies I32 and I34 to reduce the rate of discharge into the receiving vessel and prevents splashing therein. Tube I26 has an upwardly extending vent tube I 36 to insure adequate vent ing of tube I28 (see Fig. 1).

In order to prevent the condensation of any vapor rising from bowl I03 on bowl inlet opening 98 and tube 96, hot water is supplied through pipe I38 to passage I40 in top I02. Passage I40 takes a circular path exterior of inlet openings 98 and tubes 96 and is discharged through pipe I42. Since top I02 is in heat conducting relationship with bowl I03, this hot water circulation keeps bowl I03 warm, thus preventing the chilling of the first drink to be made after a period of non-use.

In order to prevent any steam rising from bowl I03 into the hoppers A, A, A" or into the passages formed between the hoppers and the bowl, a flow of air is introduced into each sleeve 94 below each valve 20 through a line I44. Each line I44 is connected to a centrifugal blower I46 of any conventional type well known in the art which is driven by a motor I48 (Fig. 1)

A duct I49 leads from blower I46 and discharges at I5I towards sleeves 94. Ducts I49 supply air which cools down the upper portions of sleeves 94 and dissipates heat rising by convection from bowl cover I02. This prevents the undesirable heating of hoppers A, A and A" which would have a deleterious effect on the food product stored therein. Avent [53 is provided to exhaust the air thus supplied.

When the flow of water from the bowl into tube I28 is suilicient to result in a full capacity flow of water through nozzle I30, the air supplied by lines I44 will not be able to vent through nozzle I30 as rapidly as is desirable. This would result in a restriction in the continuous flow of air from lines I44 downwardly into the bowl. The provision of vent tube I by providing a, passage through which the air can vent irrespective of the now conditions in nozzle I30, insures the desired continuous flow of air through lines I44 downwardly into the bowl.

The hot water utilized by the vending machine is supplied by a conventional hot water tank I which has a heating coil I 52. The temperature of the water in the tank is controlled by a thermostatically controlled switch device I54.

Tank I50 has a water supply pipe I which has a valve I58 controlled by solenoid I60. The bowl hot water supply line H4 is connected to the top of tank I50 by a pipe Hi2 which has a valve I54 controlled by solenoid I65.

Pipe I38 and pipe I42 which respectively supply and exhaust hot water into and out of passage I40 in top I02 are connected to tank I50 at 568 and I10, respectively. It will be apparent that the pipes I68 and I10 together with passage I40 form a constantly circulating hot water system with tank I50.

A cup dispenser I12 has a releasing plunger I14 operated by a solenoid I16. A tube I18 and a slide I are adapted to carry a released cup to platform I82 and support bracket I84 which are adapted to support a cup directly below nozzle I39. Any suitable automatic cup dispensing device may be used. Thus, for example, the solenoid I16 could be connected to the plunger 2I of the cup dispenser disclosed in Patent 1,260,432, issued to H. Nias and dated March 26, 1918. If the Nias dispenser were utilized, of course, his cup supporting means comprising his spring 40 and lugs 4| would not be utilized since here it is desired to permit the cup to freely fall down tube I18.

A wire recorder I86 of any kind well known in the art may be secured to the front of cabinet 4. The cabinet 4 has a cut-out portion for the reception of the wire recorder speaker H38.

Secured within casing 4 is a control box 20s. The contents of the control box will be made more apparent by the description of the wiring diagram shown in Figure 16 which will follow later. A series of selector switches 202, 204, 205 and 208 have operating buttons protruding through the control box 250 and through the casing 4. The vendee will push a selector button so that the combination which he desires will result. Thus, for purposes of example, pushing selector switch 202 will provide the vendee with a cup of coffee without cream or sugar, selector button 204 will provide a cup of coffee with sugar, button 206 will provide a cup of coffee with cream and button 208 will provide a cup of coffee with sugar and cream.

Resting on top of control box 200 is a nonoverrunning motor 2H1 having suitable reduction ears and which drives a shaft 2I'2 carried in bearings 2 I4. Bearings 2 54 are secured to a switch box 2I6 (Fig.13). A series of cams 2I8, 220, 222, 224 and 226 are secured to shaft 2I2 and adapted to operate switches 230, 232, 234, 236 and 238, re-

spectively, through the medium of cam followers 228, which are spring biased against the cams.

The are through which each cam cams down its respective follower 228 is shown schematically in Figure 15, the camming down operation taking place through the are which is shaded. The cams rotate clockwise and it will be apparent that from the zero position cam 2 I8 operates immediately followed soon thereafter by cam 220 and then simultaneously by cams 222, 224 and 226. Again cams 222, 224 and 225 permit their respective followers to move upwardly thus disengaging their respective switches before cam 220 so operates, the cam 22!], in turn, operating before the cam 2 I8 permits its follower to rise and operate its respective switch.

It will be apparent that the precise time of operation of the various cams will vary depending on the food product being dispensed as will the speed of rotation of shaft 2 I2. As in the illustrative case, it is preferable that shaft '2I2 rotate at a speed of about 8-12 R. P. M.

Cams 225, 222, 224 and 22% close switches 232, 234, 2355 and 232 when they cam their respective followers 228 downwardly. In the case of cam 2I8 it acts to shift the position of switch 239 which is a two-position switch as will be made more apparent in the description of the wiring diagram.

On the front of casing 4 at the right hand side is a coin slot 244 which is connected to a coin conduit 246 leading to a conventional coin operating and receiving mechanism 243 consisting primarily of a switch momentarily operated by the passage of the coin. The switch may be, for example, one such as is disclosed in Patent 2,461,486 issued February 8, 1949, to H. B. Vroom. As is well known in the art, the coin mechanism may have means to reject slugs.

The overall operation of the vending machine will be clarified by a consideration of the wiring diagram shown in Figure 16. A volt power supply line comprising a line 252 and 254 may be utilized by way of example. Blower motor I48 is connected across the power supply lines by line 255 and line 253, the latter line having a normally closed switch 2%, thus providing for the normal continuous operation of blower I46.

Lines 252 and 2 54 are connected to power supply lines 252 and 254, respectively, and supply power to all of the circuits of wire recorder I86 with the exception of the driving motor and its controls.

Heating coil I52 of hot water tank I55; is c0nnected across power supply lines 252 and 254 by lines 256 and 258, respectively. The thermozt atically controlled switch I54 is placed in line Relays 215, 212, and 214 which are associated with the selector switches are connected to line 216 which is connected to power supply line 254 by lines 218, 280 and 282, respectively.

Relay 210 is connected to line 234 as follows: through line 2523 in which selector switch 282 is placed: through line 286, line 2538, selector switch 204' and line 2%; through line 286, line 288, line 292, selector switch 295 and line 294; and through line 23%;, line 298, selector switch 238 and line 298.

Relay 212 is connected to line 284 as follows: line etc, selector switch 284 and line 2530; and line 330, line 382, selector switch and line 2%.

Relay 214 is connected to line 284 as follows: by line 304, selector switch 206 and line 2%; and by line 384, line 3%, selector switch 208 and line 298.

When a coin is placed in slot 244, the coin drops down and actuates switch 248, momentarily energizing relay 3! which is connected to power lines 252 and 254 by lines 3I2 and 3M, respectively.

Since relay 3I6 is energized being connected to power supply line 252 by line 3I8, switch 236 and line 326 and to line 254 by line 326, line 284 is connected to power supply line 252 through switch element 324 of relay 3I6, lines 328 and 336, relay 3I6 and lines 332 and 326.

As will be made apparent later, closing of switch 248 causes motor 2I6 to drive which in turn results in cam 2I8 immediately camming switch 236 so that it connects line 326 with line 328 instead of with line 3I8. This results in connecting line 328 to line 252 through switch 236 and line 326 causes relays 3I6 to be deenergized and, therefore, deenergizes the circuit through relay 3I8 which connects line 328 to line 252.

Switch 236 is shifted to contact line 328 before coin mechanism switch 248 opens. The relay 3I6 is thus kept energized since line 3I2 is connected to line 328 through line 334 and the switch element 324 of relay 3I6.

Now, if the customer determines that he wants cofiee without sugar or cream and consequently closes selector switch 262, it will be apparent that relay 216 will be energized which will connect line 284 to the motor 64 through line 386, switch element 338 of relay 216, line 346, line 342 and line 344. Motor 64 is also connected to line 254 by line 346. Thus as soon as relay 216 is closed, motor 64 commences to operate resulting in the reciprocation of valves 26 and the dispensing of the selected food products into bowl I62.

Cam control motor 2 It] being connected to line 344 by line 348 and to line 346 by line 356 will also commence to operate at this time. Similarly the wire tape recorder motor I86 being connected to line 344 by line 352 and to line 346 by line 354 will commence to operate.

In addition, the closing of relay 216 will actuate solenoid I16 since it is connected to line 342 and to power supply line 254 and thus a cup will be released and positioned for the reception of the beverage to be dispensed.

When relay 216 is energized, it is connected to line 284 through line 286, line 356, switch element 338 and line 336 thus keeping the relay energized irrespective of selector switch 262.

It will be apparent from the above description of the manner in which relay 216 is connected to line 284 through selector switches 264, 266 and 268 that the closing of any of these switches as well as the closing of switch 262 will result in the relay 216 being energized. Similarly it will be seen that closing of either of the selector switches 264 or 268 will result in energizing relay 212. Relay 214 will be energized by closing either selector switch 266 or selector switch 268.

As in the case of relay 216, the relays 212 and 214 each have a holding circuit connecting these relays to line 284 and by-passing all selector switches. The holding circuit of relay 212 comprises line 366, line 366, switch element 362 of relay 212 and line 364 which is connected to line 284. The holding circuit of relay 214 comprises line 364, line 366, switch element 368 of relay 214 and line 316 which is connected to line 284.

Clutch solenoid 66 which is utilized to clutch cam 12 of clutch 66 to shaft 66 is connected to line 216 by line 312 and to line 346 by line 314 and switch 234 which is operated by cam 222.

Solenoid 84 which acts to clutch cam 12 of clutch 66' is connected to line 216 by line 316 and to line 364 through line 318, switch 236, which is controlled by cam 224, line 366 and switch element 362 of relay 212.

Solenoid 88 which acts to clutch the cam 12 of clutch 66" to shaft 66 is connected to line 216 through line 382 and to line 316 by line 384, switch 236, which is controlled by cam 22 6, line 386 and switch element 368 of relay 214.

Solenoid I66 which controls water supply valve I58 is connected to power supply line 254 through line 396 and 362 and to power supply line 252 through lines 364, and 366, switch 232, which is controlled by cam 226, line 398 and line 266. Solenoid I66 which operates valve I64 which controls the flow of hot water to bowl I63 is connected to power supply line 254 by line 392 and is connected to line 396 by line 466.

The operation of the vending machine where it is desired to utilize it for dispensing a cup of coffee and where hoppers A, A, A" consequently contain powdered instant coffee, powdered or granular sugar and powdered cream, respectively, will be described a being exemplary.

Switch 266 will normally be closed and thus blower motor I48 will operate continuously causing blower I46 to supply a flow of air which will pass into each hopper and downwardly into the passages below the hopper, the hopper itself being air-tight. Also a constant circulation of hot water through chamber I46 will take place through tank I56 and through chamber I46, the temperature of tank I56 being maintained by heating coil I52 controlled by thermostatic switch I54. The circuits of the wire recorder I86 with the exception of the motor and its controls are continuously energized.

The initial step of the customer is to insert an appropriate coin in slot 244 which results in the momentary closing of switch 248. This, as we have seen results in energizing line 284 through the medium of relays 3 I 6, 3I6, switch 236 and the circuit associated with these elements, it being particularly noted that relay 3I6 has a holding circuit to keep it energized when switch 248 opens.

The customer then selects his beverage, i. e., coffee alone, cofiee and sugar, cofiee and cream or coffee, sugar and cream, by pushing the spring loaded push button of selector switch 262, selector switch 264, selector switch 266 or selector switch 268, respectively. Irrespective of which selector switch is pushed, it will be apparent from the above described circuit diagram that relay 216 will be energized. This results, in turn, in energizing line 346, thus causing motors 64, I86 and 2I6 and solenoid I16 to operate.

The operation of solenoid I16 pushes plunger I14 inwardly resulting in the release of a cup from a cup dispensing mechanism I12, the cup falling through tube I18, slide I86 and being positioned below nozzle I36.

The operation of wire recorder motor I86 results in the delivery of the recording made on the wire recorder tape to the vendee through the speaker I88.

The operation of motor 2I6 rotates shaft 2I2 which carries the timing cams 2I8, 226, 222, 224 and 226. As is apparent from the schematic showing of Figure 15, cam 2I8 immediately causes switch 236 to shift from line 3I8 to line 328 which connects line 328 to power supply line 252 through the alternate route of line 326. This operation of switch 236 simultaneously deenergizes relay 3I6,.thus opening the circuit through 9 relay 3I6 which originally connected line 252 to line 328.

Next in sequence is the closing of switch 232 by cam 226. This energizes solenoids Hi and I66 which, in turn, results in the admission of water to tank I53 through valve I68 and the supply of hot water to bowl I03 through the opening of valve I65.

Thus the hot water commences to flow in bowl I03 before any of the contents from the hoppers are delivered to the bowl. As pointed out above, the vapor rising from the hot water is prevented from getting to the powdered materials before they get into the bowl by means of hot water chamber I40 and air supplied by blower I46.

Cams 222, 224 and 226 now cam closed switches 234, 236 and 238. This results in the energizing of solenoid 8E! irrespective of which selector switch has been closed. Thus, in all cases, cam 12 of clutch 66 will be clutched to shaft 60 which is now rotating since motor 64 has been energized. Thus the valve 29 of hopper A will be rapidly reciprocated permitting coiiee to be metered out into bowl I63 where it will fall on the hot water passing over the surface of the bottom H8 of the bowl.

Similarly sugar, in addition to the coffee, will be dispensed from hopper A if either selector switch 264 or selector switch 208 was closed since solenoid 84 will then be energized causing the operation of clutch 66'. Similarly, in addi tion to coffee, the powdered cream in hopper A" will be dispensed if either selector switches 266 or 208 was closed. This will result in solenoid 83 being energized, which, in turn, operates clutch 66". The pushing of selector switch 208 will thus apparently result in the energizing of solenoids 86, 84 and 88 and thus in the simultaneous dispensing of coffee, sugar and cream into bowl I63.

Next in the sequence of events, cams 222, 224 and 226 permit switches 234, 236 and 238 to open thus stopping the dispensing of the selected ingredients from the hoppers into the bowl. As described above, as each solenoid is deenergized, spring I8 of each clutch will push clutch member II! away from clutch member 68 and force cam I2 against projection 58 until opening I4 engages projection 58 at which time the spring I8 will force flange I6 to abut against the side of projection 58. The cams as thus positioned permit each spring 34 to fully close each valve 20.

Next, cam 220 permits switch 232 to open thus stopping the flow of water into the tank I56 through valve I58 and into bowl I63 through valve I64 since solenoids I66 and I66 will be deenergized.

Following this, cam 2I8 permits switch 230 to disengage line 328 and reengage line 3I8. Cam 2I8 is cut so that there is a suflicient time interval between the disengagement of line 328 and the reengagement of line 3 I8 such that relay 3I0 will become deenergized before relay 3I6 becomes energized. This results in deenergizing line 284 which, in turn, results in deenergizing solenoid I16, motors 64, I86 and 2m and any of the relays 210, 212 and 214 which were energized. This completes a full cycle of operation.

The above described vending machine and its operation is illustrative only and this invention is intended to be limited only as set forth in the claims.

This invention is an improvement in the vending machine disclosed and claimed in patent ap plication Serial No. 95,655, filed May 2'7, 1949,

10 under the name of Richard D. Price and owned by applicants assignee.

What is claimed is:

1. In a beverage vending machine, a mixing bowl having an outlet, 9. hot water supply tank, a water delivery conduit leading from said tank to said bowl, a storage receptacle, a passage connecting said bowl and said storage receptacle,

a hot water jacket for heating said bowl and the lower portion of said passage, means to connect the hot water supply tank to said hot water jacket to provide a continuous circulation of hot water through the jacket and means to insulate the storage receptacle from the heat in said bowl and said passage.

2. In a beverage vending machine, a mixing bowl having an outlet, a hot water supply tank, a water delivery conduit leading from said tank to said bowl, a storage receptacle, a passage connecting said bowl and said storage receptacle, a hot water jacket for heating said bowl and the lower portion of said passage, means to connect the hot water supply tank to said hot water jacket to provide a continuous circulation of hot water through the jacket and means to supply a flow of air about the upper portion of said passage to insulate the storage receptacle from the heat in said bowl and in the lower portion of said passage.

3. In a beverage vending machine, a mixing bowl having an outlet, a hot water supply tank, a water delivery conduit leading from said tank to said bowl, a storage receptacle, a passage connecting said bowl and said storage receptacle, a hot water jacket for heating said bowl and the lower portion of said passage, means to connect the hot water supply tank to said hot water jacket to provide a continuous circulation of hot water through the jacket, a blower and a conduit leading from the supply side of said blower to supply a flow of air about the upper portion of said passage to insulate the storage receptacle from the heat in said bowl and in the lower portion of said passage.

4. In a beverage vending machine, a casing having therein a mixing bowl having an outlet, a hot water supply tank, a water delivery conduit leading from said tank to said bowl, a storage receptacle, a passage connecting said bowl and said storage receptacle, a hot water jacket for heating said bowl and the lower portion of said passage, means to connect the hot water supply tank to said hot water jacket to provide a continuous circulation of hot water through the jacket, a blower and a conduit leading from the supply side of said blower to supply a flow of air about the upper portion of said passage to insulate the storage receptacle from the heat in said bowl and in the lower portion of said passagei and an opening in the casing for the flow o a r.

LEROY M. LEWIS. LEROY M. LEWIS, JR.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,630,103 Young May 24, 1927 1,665,728 Canright Apr. 10, 1928 2,147,335 De Fazi Feb. 14, 1939 2,452,933 Joppich et a1. Nov. 2. 1948 2,462,019 Bowman Feb. 15, 1949 

